Automatic adjustment type spraying device for spray gun

Abstract

The application discloses a kind of automatic adjustment type spraying devices of spray gun, including rack;Rotary seat is vertically distributed with several along rack, and it is respectively by first rotation shaft horizontally rotating setting on rack;Spray gun has several, and it is respectively one-to-one through second rotation shaft vertically rotating setting rotary seat;First drive component, it is set on rack for driving several rotary seat synchronous horizontal rotation;Second drive component, it is set on rack for driving several spray gun synchronous vertical rotation.By first drive component, all rotary seat can be synchronously driven to complete horizontal angle adjustment, by second drive component, all spray gun can be synchronously driven to complete vertical pitch angle adjustment, respectively independent single power input can complete the two-dimensional angle calibration of all spray gun, compared with the structure of single gun independent adjustment, adjustment efficiency is significantly improved.

Description

Technical Field

[0001] This invention relates in particular to an automatic spray gun adjustment spraying device. Background Technology

[0002] In the automated coating process of workpiece surfaces, the spraying device is the core equipment for achieving uniform coating and ensuring coating quality. In existing technologies, most spraying devices use a fixed-mount structure for the spray gun, with both the horizontal spray angle and vertical pitch angle fixed and non-adjustable. This only suits spraying workpieces with a single plane and fixed dimensions. When dealing with irregularly shaped workpieces with curved surfaces, stepped surfaces, or side structures, the fixed-angle spray gun cannot match the normal angle of the workpiece surface, easily leading to problems such as insufficient local paint film thickness, overspray at edges, and missed spraying at corners. This results in poor coating uniformity and makes it difficult to meet high-quality coating requirements.

[0003] Most spraying devices with angle adjustment functions adopt a structure of independent adjustment for each spray gun, requiring manual adjustment of the angle of each spray gun one by one. This results in extremely low adjustment efficiency and makes it difficult to ensure the consistency of the angle of each spray gun. This can easily lead to uneven paint film thickness across the entire surface during batch spraying. At the same time, most existing adjustment structures can only achieve angle adjustment in one dimension and cannot simultaneously complete the synchronous automatic adjustment of horizontal swing and vertical pitch. This makes it difficult to match the production cycle of high-speed automated spraying production lines, thus restricting further improvement in spraying production efficiency and coating quality. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an automatic spray gun adjustment spraying device.

[0005] An automatic spray gun adjustment spraying device includes:

[0006] frame;

[0007] The rotating base has several units distributed vertically along the frame, and each unit is horizontally mounted on the frame via a first rotating shaft; the spray gun has several units, and each unit is vertically mounted on the rotating base via a second rotating shaft.

[0008] The first driving component is mounted on the frame to drive several rotating seats to rotate synchronously horizontally.

[0009] The second driving component is mounted on the frame to drive several spray guns to rotate synchronously vertically.

[0010] In one embodiment, the first driving member includes a rack, a gear, a first bevel tooth, a second bevel tooth, a driving disk, and a first connecting rod;

[0011] Several drive discs are distributed vertically along the frame, and each of them is mounted on the frame in a horizontally rotating manner via a third rotating shaft;

[0012] The first link has several parts, and each part is hinged to the drive disk and the rotating seat respectively, and the hinge point between the link and the drive disk is eccentrically set relative to the center of the drive disk.

[0013] The first bevel tooth has several of them, and they are arranged one-to-one with each other in the same center on the third rotating shaft;

[0014] The second bevel teeth are of several kinds, and each of them is rotatably mounted on the frame via the fourth rotating shaft, and they mesh with the first bevel teeth one by one for transmission.

[0015] The gears are of several kinds, and each of them is arranged on the fourth rotating shaft in a co-central axis.

[0016] The rack is mounted on the frame and moves up and down, meshing with several gears for transmission.

[0017] In one embodiment, the first driving component further includes a first screw and a first motor. The two ends of the first screw are vertically rotatable on the frame via bearings. A first guide shaft is provided on one side of the rack. The first guide shaft is movably mounted on the frame via a linear bearing. The rack is threadedly connected to the first screw. The first motor is mounted on the frame and its drive shaft is connected to the first screw.

[0018] In one embodiment, the second drive component includes a second link, a lifting frame, and a movable frame;

[0019] The second connecting rod has several parts, and each part is fixedly installed at one end of the second rotating shaft, with a fixed shaft on one side of it;

[0020] The movable frame has several units, each corresponding to an upper or lower movable rotating seat. A movable straight groove is opened through one side of each unit, and the fixed shaft is movably installed in the movable straight groove.

[0021] The lifting frame is mounted vertically on the machine frame. Several clearance grooves are recessed vertically on the side facing the lifting frame. The lifting frame is partially located in the clearance grooves, and the lifting frame remains within the area of ​​the clearance grooves when it swings back and forth with the rotating seat.

[0022] In one embodiment, the second driving component further includes a second screw and a second motor. The two ends of the second screw are vertically rotatable on the frame via bearings. A second guide shaft is provided on one side of the lifting frame. The second guide shaft is movably mounted on the frame via a linear bearing. The lifting frame is threadedly connected to the second screw. The second motor is mounted on the frame and its drive shaft is connected to the second screw.

[0023] In one embodiment, the system further includes an X-axis moving platform, with the frame disposed at the moving end of the X-axis moving platform.

[0024] In one embodiment, the system further includes an XZ-axis moving platform, on which the frame is mounted.

[0025] In one embodiment, several of the rotating seats are arranged at equal intervals along the vertical direction of the frame, and the spraying direction of each spray gun is set towards the same side of the frame.

[0026] In summary, the advantages of this invention over the prior art are:

[0027] This invention enables all rotating seats to be driven simultaneously to adjust their horizontal angles via a first driving component, and all spray guns to be driven simultaneously to adjust their vertical pitch angles via a second driving component. Each spray gun can be calibrated in two dimensions with a single independent power input, significantly improving adjustment efficiency compared to a structure where each gun is adjusted independently. Furthermore, each group of spray guns is driven synchronously by the same transmission chain, ensuring high angle consistency and effectively guaranteeing uniform paint film thickness across the entire surface, thus reducing coating defects such as missed spraying and overspraying.

[0028] Furthermore, the first drive component adopts a transmission layout with single power input and multiple sets of synchronous output. The vertically arranged transmission structure does not occupy the horizontal working space and has a compact structure. The second drive component achieves motion decoupling between the horizontal swing of the rotating seat and the vertical rotation of the spray gun through the clearance groove structure of the lifting frame. The adjustment actions in the two dimensions do not interfere with each other and can be carried out independently or synchronously. The transmission process is smooth and without jamming, and the structure has high reliability. Attached Figure Description

[0029] Figure 1 This is one of the perspective schematic diagrams of an automatic spray gun adjustment spraying device according to one embodiment of the present invention;

[0030] Figure 2 This is a second perspective view of an automatic spray gun adjustment spraying device according to one embodiment of the present invention;

[0031] Figure 3 This is one of the exploded views of an automatic spray gun adjustment spraying device according to one embodiment of the present invention;

[0032] Figure 4 As one embodiment of the present invention Figure 3 Enlarged view of point A;

[0033] Figure 5 This is a second exploded view of an automatic spray gun adjustment spraying device according to one embodiment of the present invention;

[0034] Figure 6 This is the third exploded view of an automatic spray gun adjustment spraying device according to one embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] like Figures 1 to 6 The present invention preferably provides an automatic spray gun adjustment spraying device, including a frame 1; a plurality of rotating seats 2, which are vertically distributed along the frame 1 and are respectively horizontally rotatable on the frame 1 via a first rotating shaft 3; a plurality of spray guns 4, which are respectively vertically rotatable on the rotating seats 2 via a second rotating shaft 5; a first driving member 6, which is disposed on the frame 1 to drive the plurality of rotating seats 2 to rotate synchronously horizontally; and a second driving member 7, which is disposed on the frame 1 to drive the plurality of spray guns 4 to rotate synchronously vertically.

[0037] Specifically, the device uses a frame as the overall mounting base, with each spray gun mounted on a corresponding rotating base via a second rotating shaft. The rotating base rotates horizontally on the frame via a first rotating shaft, thereby adjusting the horizontal spray angle of the spray gun. The spray gun itself rotates vertically on the rotating base via a second rotating shaft, thereby adjusting its vertical pitch angle. The first drive component provides synchronous power to all rotating bases, enabling all spray guns to adjust their horizontal angles synchronously; the second drive component provides synchronous power to all spray guns, enabling them to adjust their vertical angles synchronously, ultimately achieving synchronous automatic adjustment of the dual-dimensional angles of multiple spray guns.

[0038] Further, the first driving component 6 includes a rack 8, gears 9, first bevel teeth 10, second bevel teeth 11, a driving disk 12, and a first connecting rod 13; the driving disk 12 has several vertically distributed along the frame 1, and each is horizontally rotatably mounted on the frame 1 via a third rotating shaft; the first connecting rod 13 has several, and each is hinged to the driving disk 12 and the rotating seat 2, with the hinge point between the connecting rod and the driving disk 12 being eccentrically positioned relative to the center of the driving disk 12; the first bevel teeth 10 have several, and each is concentrically mounted on the third rotating shaft; the second bevel teeth 11 have several, and each is rotatably mounted on the frame 1 via a fourth rotating shaft, and meshes with the first bevel teeth 10; the gears 9 have several, and each is concentrically mounted on the fourth rotating shaft 14; the rack 8 is movably mounted on the frame 1 and meshes with the gears 9.

[0039] Specifically, the first driving component uses a transmission chain of rack, pinion, bevel gear, and crank connecting rod to achieve synchronous drive: when the rack moves up and down along the frame, it synchronously drives all the gears meshing with it to rotate; the gear drives the second bevel gear to rotate synchronously through the fourth rotating shaft, and the second bevel gear meshes with the first bevel gear to change the transmission direction, converting the rotation of the horizontal rotating shaft into the rotation of the vertical third rotating shaft, thereby driving the drive disc to rotate horizontally; the drive disc converts its own rotational motion into the reciprocating horizontal oscillation of the rotating seat around the first rotating shaft through the eccentrically hinged first connecting rod, and finally realizes the synchronous horizontal rotation of all rotating seats through the movement of a single rack.

[0040] Furthermore, the first driving component 6 also includes a first screw 15 and a first motor 16. The two ends of the first screw 15 are vertically rotatable on the frame 1 via bearings. A first guide shaft 17 is provided on one side of the rack 8. The first guide shaft 17 is movably mounted on the frame 1 via a linear bearing. The rack 8 is threadedly connected to the first screw 15. The first motor 16 is mounted on the frame 1 and its drive shaft is connected to the first screw 15.

[0041] Specifically, the first motor outputs rotational power, driving the first screw to rotate synchronously; the first screw and rack cooperate to form a lead screw and nut transmission pair, converting the rotational motion of the screw into the vertical linear motion of the rack; the first guide shaft cooperates with the linear bearing to provide vertical guidance for the rack, restricting the circumferential deflection of the rack, ensuring that the rack lifting process is smooth, and always maintaining stable meshing with all gears, ultimately realizing the precise electronic control drive of the first drive component.

[0042] Further, the second driving component 7 includes a second connecting rod 18, a lifting frame 19, and a movable frame 20; the second connecting rod 18 has several components, each of which is fixedly disposed at one end of the second rotating shaft 5, and a fixed shaft 21 is provided on one side of the connecting rod 18; the movable frame 20 has several components, each of which is fixedly disposed on the upper and lower movable rotating seat 2, and a movable straight groove 22 is provided through one side of the movable frame 20, and the fixed shaft 21 is movably disposed in the movable straight groove 22; the lifting frame 19 is movably disposed on the frame 1, and a number of clearance grooves 23 are recessed vertically on the side facing the movable frame 20, and the movable frame 20 is partially located in the clearance grooves 23, and the movable frame 20 remains within the area of ​​the clearance grooves 23 when it swings back and forth with the rotating seat 2.

[0043] Specifically, the second driving component synchronously drives all spray guns to complete vertical rotation through the vertical movement of the lifting frame: when the lifting frame moves up and down along the frame, it drives all movable frames to rise and fall synchronously through the clearance groove; the movable straight groove on the movable frame pushes the fixed shaft on the second connecting rod, causing the second connecting rod to deflect around the second rotating shaft, and then drives the spray guns to complete the vertical pitch angle adjustment through the second rotating shaft. When the rotating seat drives the spray gun to swing horizontally, the movable frame moves horizontally with the rotating seat within the clearance groove of the lifting frame, and is always within the coverage area of ​​the clearance groove. Therefore, the horizontal swing and vertical adjustment actions do not interfere with each other and can be carried out independently or synchronously.

[0044] Furthermore, the second driving component 7 also includes a second screw 24 and a second motor 25. The two ends of the second screw 24 are vertically rotatable on the frame 1 via bearings. A second guide shaft 26 is provided on one side of the lifting frame 19. The second guide shaft 26 is movably mounted on the frame 1 via a linear bearing. The lifting frame 19 is threadedly connected to the second screw 24. The second motor 25 is mounted on the frame 1 and its drive shaft is connected to the second screw 24.

[0045] Specifically, the second motor outputs rotational power, driving the second screw to rotate synchronously; the second screw and the lifting frame cooperate to form a screw-nut transmission pair, converting the rotational motion of the screw into the vertical linear motion of the lifting frame; the second guide shaft and the linear bearing cooperate to provide vertical guidance for the lifting frame, restricting the circumferential deflection of the lifting frame, ensuring the smooth lifting process of the lifting frame, and being able to stably drive all movable frames to move synchronously, ultimately realizing the precise electronic control drive of the second drive component.

[0046] In one embodiment, an X-axis moving platform (not shown) is also included, with the frame 1 disposed at the moving end of the X-axis moving platform (not shown). Specifically, the X-axis moving platform can drive the frame to move linearly back and forth along the horizontal direction. Combined with the angle adjustment function of the spray gun itself, the horizontal spraying coverage range of the device can be expanded to accommodate workpieces with larger widths, or to realize continuous horizontal spraying operations.

[0047] In another embodiment, an XZ-axis moving platform (not shown in the figure) is also included, and the frame 1 is disposed on the XZ-axis moving platform (not shown in the figure). Specifically, the XZ-axis moving platform can drive the frame to complete two-dimensional linear movement in both horizontal and vertical directions simultaneously. Combined with the angle adjustment function of the spray gun itself, the spatial adaptability of the device can be further improved, adapting to the spraying of large-sized, multi-curved complex workpieces and meeting more diverse spraying trajectory requirements.

[0048] Furthermore, several rotating seats 2 are arranged at equal intervals along the vertical direction of the frame 1, and the spraying direction of each spray gun 4 is set towards the same side of the frame 1. Specifically, the arrangement of several rotating seats at equal intervals along the vertical direction of the frame, and the corresponding spray guns are also distributed vertically at equal intervals, can ensure the uniformity of vertical spraying coverage and avoid spraying blind spots due to excessive spacing; all spray guns are set towards the same side of the frame to ensure a unified spraying operation direction, which is suitable for assembly line-style workpiece spraying scenarios.

[0049] In another embodiment, a controller and an angle detection unit are also included. The angle detection unit is used to detect the horizontal rotation angle and the vertical rotation angle of the spray gun. The controller is electrically connected to the first drive component, the second drive component, and the angle detection unit, respectively.

[0050] Angle detection unit 1 is used to collect the horizontal swing angle and vertical pitch angle of the spray gun in real time, and feed back the real-time angle signal to controller 1 to form a closed-loop control system. The angle detection unit is divided into a horizontal angle detection module, a vertical angle detection module, and a matching limit detection structure.

[0051] The horizontal angle detection module is used to collect the horizontal swing angle of the rotating seat around the first axis, corresponding to the horizontal spray direction of the spray gun. It can be implemented in the following two ways:

[0052] High-precision direct measurement solution: Each rotating base is equipped with a first rotary encoder, a first mounting bracket, and a rigid coupling. The first rotating shaft is a follower shaft, with one end extending axially through the outer wall of the frame. The first mounting bracket is fixed to the outer wall of the frame with bolts, coaxial with the first rotating shaft. The housing of the first rotary encoder is fixed to the first mounting bracket, and its input shaft is coaxially fixed to the extended end of the first rotating shaft through the rigid coupling. When the rotating base swings, it directly drives the first rotating shaft and the encoder input shaft to rotate synchronously, directly outputting a real-time angle signal without transmission backlash error.

[0053] Low-cost indirect measurement solution: Only one second rotary encoder and one matching mounting bracket are configured. The uppermost fourth rotating shaft is selected as the detection shaft, with one end of the fourth rotating shaft extending through and beyond the outside of the frame. The second rotary encoder is coaxially mounted on this extended end. Since a single rack synchronously drives all gears, and the transmission parameters of each group are completely consistent, the horizontal swing angle of all rotating seats can be calculated by collecting the rotation angle of the fourth rotating shaft and combining the gear transmission ratio, bevel gear transmission ratio, and crank-connecting rod rotation angle conversion relationship.

[0054] The vertical angle detection module is used to collect the vertical pitch angle of the spray gun around the second axis of rotation, and can be implemented in the following two ways:

[0055] Direct-connection detection scheme: Each spray gun is equipped with a third rotary encoder, a third mounting bracket, and a flexible coupling. The end of the second rotating shaft away from the second connecting rod extends out of the opposite side wall of the rotating base. The third mounting bracket is fixed to this side wall of the rotating base, and the housing of the third rotary encoder is fixed to the third mounting bracket. Its input shaft is coaxially fixed to the extended end of the second rotating shaft through the flexible coupling. The encoder as a whole swings horizontally synchronously with the rotating base. Flexible cable chains are provided on the frame corresponding to the swing range of each rotating base. The signal cable and power cable of the third rotary encoder are laid along the cable chain, with sufficient swing margin reserved, and adaptively bends with the reciprocating swing of the rotating base to avoid pulling damage.

[0056] Non-contact magnetoelectric detection solution: Each spray gun is equipped with a magnetic steel sheet and a magnetic induction angle detection head. The magnetic steel sheet is a radially magnetized circular permanent magnet, coaxially bonded to the detection end face of the second rotating shaft, rotating synchronously with the second rotating shaft. The magnetic induction angle detection head is fixed to the side wall of the rotating seat by a bracket, arranged coaxially opposite to the magnetic steel sheet, with a 0.5~2mm air gap between them, and no mechanical contact. When the second rotating shaft drives the magnetic steel sheet to rotate, the detection head collects the change in magnetic field angle through a built-in magnetoresistive element and outputs the corresponding rotation angle signal. This solution is wear-free, has a high protection level, and can withstand the paint mist and dust environment of the spray painting workshop.

[0057] Limit detection switches are installed on the frame at the two swing limit positions corresponding to the rotating seat. The limit detection switches are either proximity switches or photoelectric switches, and the signals are connected to the controller. When the rotating seat swings to the limit angle and triggers the switch, the controller immediately cuts off the power output of the first driving component, realizing electronic soft limit protection, which forms a double protection with the mechanical limit block.

[0058] The rotating base is equipped with limit bosses and limit switches at the two extreme positions corresponding to the vertical pitch of the spray gun. The limit switch signals are connected to the controller to realize overtravel protection of the vertical angle.

[0059] All detection components are industrial-grade products with IP65 or higher protection rating, and dustproof sealing rings are installed at exposed shafts; if necessary, a transparent protective cover can be added to the outside of the detection components to prevent paint mist from adhering and to ensure detection accuracy and service life.

[0060] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic spray gun adjustment spraying device, characterized in that, include: Rack (1); Rotary base (2), which has several vertically distributed along the frame (1), and is horizontally mounted on the frame (1) via the first rotating shaft (3); Spray gun (4), which has several, and is vertically mounted on the rotating base (2) via the second rotating shaft (5); The first driving component (6) is mounted on the frame (1) to drive several rotating seats (2) to rotate synchronously horizontally; The second driving component (7) is mounted on the frame (1) to drive several spray guns (4) to rotate synchronously vertically.

2. The automatic spray gun adjustment spraying device according to claim 1, characterized in that: The first driving component (6) includes a rack (8), a gear (9), a first bevel tooth (10), a second bevel tooth (11), a driving disk (12), and a first connecting rod (13). A drive disk (12) is vertically distributed along the frame (1), and each of them is horizontally mounted on the frame (1) via a third rotating shaft; The first link (13) has several of them, and each of them is hinged to the drive disk (12) and the rotating seat (2) respectively, and the hinge point between the link and the drive disk (12) is eccentrically set relative to the center of the drive disk (12). The first bevel tooth (10) has several of them, and they are arranged in a co-center manner on the third rotating shaft; The second bevel tooth (11) has several of them, and they are rotatably mounted on the frame (1) through the fourth rotating shaft (14) respectively, and they mesh with the first bevel tooth (10) respectively. Gears (9) are of several kinds, and each of them is arranged on the fourth rotating shaft (14) in a co-central axis; The rack (8) is mounted on the frame (1) and meshes with several gears (9) for transmission.

3. The automatic spray gun adjustment spraying device according to claim 2, characterized in that: The first driving component (6) further includes a first screw (15) and a first motor (16). The two ends of the first screw (15) are vertically rotatable on the frame (1) through bearings. A first guide shaft (17) is provided on one side of the rack (8). The first guide shaft (17) is movably mounted on the frame (1) through a linear bearing. The rack (8) is threadedly connected to the first screw (15). The first motor (16) is mounted on the frame (1) and its drive shaft is connected to the first screw (15).

4. The automatic spray gun adjustment spraying device according to claim 1, characterized in that: The second drive component (7) includes a second link (18), a lifting frame (19), and a movable frame (20); The second link (18) has several parts, and each part is fixedly installed at one end of the second rotating shaft (5), with a fixed shaft (21) on one side. The movable frame (20) has several of them, and each of them corresponds to the upper and lower movable rotating seats (2). A movable straight groove (22) is opened through one side of the frame, and the fixed shaft (21) is movably arranged in the movable straight groove (22). The lifting frame (19) is mounted on the frame (1) and has several recessed grooves (23) on the side facing the movable frame (20). The movable frame (20) is partially located in the recessed grooves (23) and remains within the area of ​​the recessed grooves (23) when the movable frame (20) swings back and forth with the rotating seat (2).

5. The automatic spray gun adjustment spraying device according to claim 4, characterized in that: The second driving component (7) also includes a second screw (24) and a second motor (25). The two ends of the second screw (24) are vertically rotatable on the frame (1) through bearings. A second guide shaft (26) is provided on one side of the lifting frame (19). The second guide shaft (26) is movably mounted on the frame (1) through a linear bearing. The lifting frame (19) is threadedly connected to the second screw (24). The second motor (25) is mounted on the frame (1) and its drive shaft is connected to the second screw (24).

6. The automatic spray gun adjustment spraying device according to claim 1, characterized in that: It also includes an X-axis moving platform, wherein the frame (1) is disposed at the moving end of the X-axis moving platform.

7. The automatic spray gun adjustment spraying device according to claim 1, characterized in that: It also includes an XZ axis moving platform, and the frame (1) is mounted on the XZ axis moving platform.

8. The automatic spray gun adjustment spraying device according to claim 1, characterized in that: Several rotating seats (2) are arranged at equal intervals along the vertical direction of the frame (1), and the spraying direction of each spray gun (4) is set towards the same side of the frame (1).

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